Yocto - 在rootfs中集成Larid的无线模块

1，首先下载Laird的Yocto recipe压缩包。

GitHub - LairdCP/meta-summit-radio: Example Yocto/OE layer for integrating Laird Connectivity Wi-Fi radio modules

2，修改本地Yocto的位于imx-yoctoe-bsp/build路径的bblayers.conf，将Laird的layer加进去。

BBLAYERS = " \

  ${BSPDIR}/sources/poky/meta \

  ${BSPDIR}/sources/poky/meta-yocto \

  \

  ${BSPDIR}/sources/meta-openembedded/meta-oe \

  ${BSPDIR}/sources/meta-openembedded/meta-multimedia \

  \

  ${BSPDIR}/sources/meta-fsl-arm \

  ${BSPDIR}/sources/meta-fsl-arm-extra \

  ${BSPDIR}/sources/meta-fsl-demos \

  ${BSPDIR}/sources/meta-summit-radio/meta-summit-radio-pre-3.4 \

最后一行就是。

3，将下载的Laird的recipe压缩包解压到上面添加的路径。

${BSPDIR}/sources/meta-summit-radio/

因为我本地Yocto版本是3.2，低于3.4版本，所以使用pre-3.4的文件夹。

4，修改Kernel config。

#Rebuild kernel with proper configuration.

cd ~/imx-yocto-bsp/

source setup-environment build/

bitbake -c menuconfig virtual/kernel

修改如下配置：

CONFIG_ARCH_BERLIN  need to be disabled

Platform Selection  -->

[ ] Marvell Berlin SoC Family

Networking support --> Wireless

[ ] cfg80211

Device Driver -->

[*] LED support

<*> LED Class Support

<*> LED Support for GPIO connected LED

[*] LED support for LEDs on system controller

-*-  LED Trigger support

<*> LED Heartbeat Trigger

[*] LED CPU trigger

Cryptographic API -->

<*> CCM support

<*> GCM/GMAC support

<*> CMAC support

<*> CRC32 CRC algorithm

<*> AES cipher algorithms

<*> ARC4 cipher algorithm

Kernel hacking

<*> Kernel debugging

修改完kernel config后，重编时会生效。

5，在local.conf中，或者image.bb中，加入脚本：

IMAGE_INSTALL += "\

kernel-module-60-backports-summit \

60-radio-firmware-sdio-uart \

"

PREFERRED_RPROVIDER_wireless-regdb-static = "60-radio-firmware-sdio-uart"

6，重新构建rootfs，则相关的Laird的无线模块被集成进Linux系统中。

更新roofts后，在dmesg中可以看到相关模组信息：

[    3.097300] Loading modules backported from Summit Linux version LRD-REL-11.39.0.18-0-g5de64d7583da

[    3.097331] Backport generated by backports.git v11.39.0.18

[    3.625826] lrdmwl_sdio mmc0:0001:1: <<Laird Connectivity 60 Series Wireless Network Driver version 11.39.0.18-P39-20190123>>

也可以在文件系统中查看：